<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta http-equiv="var1" content="val1">
    <meta name="var2" content="val2">

    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
    <script type="text/javascript" src="http://wt-plugins.googlecode.com/files/jquery.wtMeta.js"></script>
  </head>
  <body>
      <div id="out1">output</div>
      <div id="out2">output</div>
      <div id="out3">output</div>

      <script type="text/javascript">
        $(function(){
            $('#out1').html($.wtMeta('var1'));

            $('#out2').html($.wtMeta('var2'));

            $.wtMeta('var1','new value');
            $('#out3').html($.wtMeta('var1'));
           });

      </script>
  </body>
</html>